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Implement multiline labels in the Large Item view by using DrawText

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Note that this now highlights weaknesses in the label measuring code
etc. which cannot correctly handle multiline labels.
This commit is contained in:
Bill Medland 2002-02-22 21:23:02 +00:00 committed by Alexandre Julliard
parent 923861fbd2
commit d10c9a47b8
1 changed files with 75 additions and 59 deletions
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134
dlls/comctl32/listview.c
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@ -3248,9 +3248,9 @@ static VOID LISTVIEW_DrawItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem, BOOL F
* PARAMETER(S):
* [I] HWND : window handle
* [I] HDC : device context handle
* [I] LISTVIEW_ITEM * : item
* [I] INT : item index
* [I] RECT * : clipping rectangle
* [I] RECT : clipping rectangle
* [O] RECT * : The text rectangle about which to draw the focus
*
* RETURN:
* None
@ -3259,10 +3259,11 @@ static VOID LISTVIEW_DrawLargeItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem,
RECT *SuggestedFocus)
{
LISTVIEW_INFO *infoPtr = (LISTVIEW_INFO *)GetWindowLongW(hwnd, 0);
UINT textoutOptions = ETO_CLIPPED | ETO_OPAQUE;
WCHAR szDispText[DISP_TEXT_SIZE] = { '\0' };
INT nDrawPosX, nLabelWidth, rcWidth;
LVITEMW lvItem;
UINT uFormat = DT_TOP | DT_CENTER | DT_WORDBREAK | DT_NOPREFIX |
DT_EDITCONTROL ;
/* Maintain this format in line with the one in LISTVIEW_UpdateLargeItemRect*/
RECT rcTemp;
TRACE("(hwnd=%x, hdc=%x, nItem=%d, left=%d, top=%d, right=%d, bottom=%d)\n",
@ -3286,19 +3287,42 @@ static VOID LISTVIEW_DrawLargeItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem,
rcTemp.right = infoPtr->rcList.right;
else
rcTemp.right+=WIDTH_PADDING;
/* The comment doesn't say WIDTH_PADDING applies to large icons */
TRACE("background rect (%d,%d)-(%d,%d)\n",
rcTemp.left, rcTemp.top, rcTemp.right, rcTemp.bottom);
LISTVIEW_FillBackground(hwnd, hdc, &rcTemp);
/* Figure out text colours etc. depending on state
* At least the following states exist; there may be more.
* Many items may be selected
* At most one item may have the focus
* The application may not actually be active currently
* 1. The item is not selected in any way
* 2. The cursor is flying over the icon or text and the text is being
* expanded because it is not fully displayed currently.
* 3. The item is selected and is focussed, i.e. the user has not clicked
* in the blank area of the window, and the window (or application?)
* still has the focus.
* 4. As 3 except that a different window has the focus
* 5. The item is the selected item of all the items, but the user has
* clicked somewhere else on the window.
* Only a few of these are handled currently. In particular 2 is not yet
* handled since we do not support the functionality currently (or at least
* we didn't when I wrote this)
*/
if (lvItem.state & LVIS_SELECTED)
{
/* set item colors */
SetBkColor(hdc, GetSysColor(COLOR_HIGHLIGHT));
SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT));
SetBkMode (hdc, OPAQUE);
/* set raster mode */
SetROP2(hdc, R2_XORPEN);
/* When exactly is it in XOR? while being dragged? */
}
else
{
@ -3306,7 +3330,6 @@ static VOID LISTVIEW_DrawLargeItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem,
if ( (infoPtr->clrTextBk == CLR_DEFAULT) || (infoPtr->clrTextBk == CLR_NONE) )
{
SetBkMode(hdc, TRANSPARENT);
textoutOptions &= ~ETO_OPAQUE;
}
else
{
@ -3319,24 +3342,37 @@ static VOID LISTVIEW_DrawLargeItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem,
SetROP2(hdc, R2_COPYPEN);
}
/* In cases 2,3 and 5 (see above) the full text is displayed, with word
* wrapping and long words split.
* In cases 1 and 4 only a portion of the text is displayed with word
* wrapping and both word and end ellipsis. (I don't yet know about path
* ellipsis)
*/
uFormat |= ( (lvItem.state & LVIS_FOCUSED) && infoPtr->bFocus) ?
DT_NOCLIP
:
DT_WORD_ELLIPSIS | DT_END_ELLIPSIS;
/* draw the icon */
if (infoPtr->himlNormal != NULL)
{
if ((lvItem.state & LVIS_SELECTED) && (lvItem.iImage>=0))
if (lvItem.iImage >= 0)
{
ImageList_Draw(infoPtr->himlNormal, lvItem.iImage, hdc, rcItem.left,
rcItem.top, ILD_SELECTED);
}
else if (lvItem.iImage>=0)
{
ImageList_Draw(infoPtr->himlNormal, lvItem.iImage, hdc, rcItem.left,
rcItem.top, ILD_NORMAL);
ImageList_Draw (infoPtr->himlNormal, lvItem.iImage, hdc, rcItem.left,
rcItem.top,
(lvItem.state & LVIS_SELECTED) ? ILD_SELECTED : ILD_NORMAL);
}
}
/* Draw the text below the icon */
/* Don't bother painting item being edited */
if (infoPtr->hwndEdit && lvItem.state & LVIS_FOCUSED)
if ((infoPtr->hwndEdit && (lvItem.state & LVIS_FOCUSED)) ||
!lstrlenW(lvItem.pszText))
{
SetRectEmpty(SuggestedFocus);
return;
}
/* Since rcItem.left is left point of icon, compute left point of item box */
rcItem.left -= ((infoPtr->nItemWidth - infoPtr->iconSize.cx) / 2);
@ -3353,56 +3389,36 @@ static VOID LISTVIEW_DrawLargeItem(HWND hwnd, HDC hdc, INT nItem, RECT rcItem,
InflateRect(&rcItem, -(2*CAPTION_BORDER), 0);
rcItem.top += infoPtr->iconSize.cy + ICON_BOTTOM_PADDING;
nLabelWidth = ListView_GetStringWidthW(hwnd, lvItem.pszText);
TRACE("rect for text sizing (%d,%d)-(%d,%d), text width %d\n",
rcItem.left, rcItem.top, rcItem.right, rcItem.bottom,
nLabelWidth);
/* append an ellipse ('...') if the caption won't fit in the rect */
rcWidth = max(0, rcItem.right - rcItem.left);
if (nLabelWidth > rcWidth)
{
/* give or take a couple, how many average sized chars would fit? */
INT nCharsFit = infoPtr->ntmAveCharWidth > 0 ?
rcWidth/infoPtr->ntmAveCharWidth + 2 : 0;
INT eos = min(strlenW(lvItem.pszText), nCharsFit);
if (eos > 0) lvItem.pszText[eos-1] = '.';
if (eos > 1) lvItem.pszText[eos-2] = '.';
if (eos < 3) lvItem.pszText[eos] = '\0';
for ( ; eos > 2; eos--)
{
lvItem.pszText[eos - 3] = '.';
lvItem.pszText[eos] = '\0';
if (ListView_GetStringWidthW(hwnd, lvItem.pszText) <= rcWidth) break;
}
}
InflateRect(&rcItem, 2*CAPTION_BORDER, 0);
nDrawPosX = infoPtr->iconSpacing.cx - 2*CAPTION_BORDER - nLabelWidth;
if (nDrawPosX > 1)
{
rcItem.left += nDrawPosX / 2;
rcItem.right = rcItem.left + nLabelWidth + 2*CAPTION_BORDER;
}
else
{
rcItem.left += 1;
rcItem.right = rcItem.left + infoPtr->iconSpacing.cx - 1;
}
/* draw label */
rcItem.bottom = rcItem.top + infoPtr->ntmHeight + HEIGHT_PADDING;
TRACE("rect for text (%d,%d)-(%d,%d)\n",
rcItem.left, rcItem.top, rcItem.right, rcItem.bottom);
if (lstrlenW(lvItem.pszText))
{
ExtTextOutW(hdc, rcItem.left + CAPTION_BORDER, rcItem.top, textoutOptions,
&rcItem, lvItem.pszText, lstrlenW(lvItem.pszText), NULL);
CopyRect(SuggestedFocus, &rcItem);
/* I am sure of most of the uFormat values. However I am not sure about
* whether we need or do not need the following:
* DT_EXTERNALLEADING, DT_INTERNAL, DT_CALCRECT, DT_NOFULLWIDTHCHARBREAK,
* DT_PATH_ELLIPSIS, DT_RTLREADING,
* We certainly do not need
* DT_BOTTOM, DT_VCENTER, DT_MODIFYSTRING, DT_LEFT, DT_RIGHT, DT_PREFIXONLY,
* DT_SINGLELINE, DT_TABSTOP, DT_EXPANDTABS
*/
/* If the text is being drawn without clipping (i.e. the full text) then we
* need to jump through a few hoops to ensure that it all gets displayed and
* that the background is complete
*/
if (uFormat & DT_NOCLIP)
{
HBRUSH hBrush = CreateSolidBrush(GetBkColor (hdc));
DrawTextW (hdc, lvItem.pszText, -1, &rcItem, uFormat | DT_CALCRECT);
FillRect(hdc, &rcItem, hBrush);
DeleteObject(hBrush);
}
else
SetRectEmpty(SuggestedFocus);
/* else ? What if we are losing the focus? will we not get a complete
* background?
*/
DrawTextW (hdc, lvItem.pszText, -1, &rcItem, uFormat);
CopyRect(SuggestedFocus, &rcItem);
}
/***